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temperature control using 8086 microprocessor by vikas arya
This document describes a temperature control system using an 8086 microprocessor. It includes a block diagram of the components, including an 8279 interfacing with the 8086 microprocessor. It also includes flowcharts and descriptions of the program modules, including an executive section in Module 1 that initializes components and stores temperature and timing variables. Module 2 contains interrupt service procedures, Module 3 contains loop service procedures like temperature control, and Module 4 includes utility procedures like LED display and A/D conversion. The goal is to use this system to maintain the required temperature in industrial processes by controlling heaters based on feedback from temperature sensors.
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temperature control using 8086 microprocessor by vikas arya
- 1. BY VIKAS ARYA M.TECH (FULLTIME) “TEMPRATURE CONTROL USING 8086 MICROPROCESSOR”
- 2. INTRODUCTION In mostof the manufacturing industries like chemical, petrochemical, food processing, pharmaceutical and some time in scientific research etc temperature is one of the main parameter to be control. Because in these kind of industries some product need the required temperature to be maintained at highest priority otherwise the product will fail . So the temperature controller is most widely used in almost all the industries.
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- 4. 8279 INTERFACING WITH8086 MICROPROCESSOR
- 6. TEMPERATURE VERSUS TIMERESPONSES FOR THERMOSTAT –CONTROLLED AND MICROCOMPUTER CONTROLLED HEATERS
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- 8. PROGRAM 1. Module1 mainline 2. Module 2 interrupt service procedures 3. Module 3 loop service procedures 4. Module 4 utility procedures
- 9. 1. MODULE 1MAINLINE OR EXECUTIVE SECTION USES PORT P2B (FFFAH) AS OUTPUT USES PORT P2A (FFF8H) AS DATA INPUT USES PORT C (FFFCH) AS END OF CONVERSION INITIALIZE 8259 INITIALIZE 8254 COUNTER 0 TO 1 KHZ OUTPUT COUNTER for number of interrupts TIME HI HEATER RELAY TIME ON TIME LO HEATER RALAY TIME OFF CURRENT TEMPRATURE SETPOINT TEAMPRATURE STORAGE FOR LOOP COUNTER .
- 10. 2. MODULE 2INTERRUPT SERVICE PROCEDURES Interrupt procedure to service keyboard Interrupt procedure to service process control loop
- 11. 3. MODULE 3LOOP SERVICE PROCEDURES Contain the procedures to service loop Procedure to service temperature controller
- 12. 4 . MODULE4 UTILITY PROCEDURES Procedure to display data on 8086 leds Procedure to control A/D converter Converts an 8-bit binary number to packed BCD equivalent